Experimental protection of quantum gates against decoherence and control errors

TL;DR

This paper demonstrates experimentally that dynamical decoupling techniques can protect quantum gates from decoherence and control errors, enabling high-fidelity quantum operations even in noisy environments.

Contribution

It provides a proof of principle that quantum gates can be protected against environmental noise using dynamical decoupling, improving quantum control fidelity.

Findings

Decoherence can be reduced during quantum gate operations.

High fidelity gates achieved despite gate times exceeding decoherence times.

Dynamical decoupling enhances quantum gate robustness against environmental fluctuations.

Abstract

One of the biggest challenges for implementing quantum devices is the requirement to perform accurate quantum gates. The destructive effects of interactions with the environment present some of the most difficult obstacles that must be overcome for precise quantum control. In this work we implement a proof of principle experiment of quantum gates protected against a fluctuating environment using dynamical decoupling techniques. We show that decoherence can be reduced during the application of quantum gates. High fidelity quantum gates can be achieved even if the gate time exceeds the decoherence time by one order of magnitude.